Open AccessBIOSENSOR SYSTEM DESIGN FOR DISSOLVED OXYGEN MEASUREMENT USING CURRENT MIRROR CIRCUIT
Author(s) -
Lazuardi Umar,
Rahmondia Nanda Setiadi,
Arfianti Arfianti,
Tetty Marta Linda
Publication year - 2019
Publication title -
spektra
Language(s) - English
Resource type - Journals
eISSN - 2541-3392
pISSN - 2541-3384
DOI - 10.21009/spektra.042.05
Subject(s) - biosensor , current mirror , current (fluid) , electrical impedance , noise (video) , power (physics) , amperometry , materials science , electrical engineering , computer science , electronic engineering , voltage , electrode , engineering , chemistry , physics , nanotechnology , transistor , quantum mechanics , artificial intelligence , electrochemistry , image (mathematics)
It has been designed a biosensor system using the current mirror circuit. Biosensor system usually implements an amperometric circuit such as a trans-impedance to measure the current value that flows in the solution due to the dissolved oxygen in it. The trans-impedance circuit causing rather high noise, besides that the power supply used must be bipolar; otherwise the measurement range would be narrower. In this paper, a current mirror circuit is used to convert the flowing current in the solution. The current mirror circuit has a lower noise level, besides the power supply needed is just unipolar, and the measurement range much wider. By utilizing this circuit, the biosensor measurement system can be optimized with its achieved advantages